Notebook hard drive is obviously smaller than their desktop counterparts. This is necessary to move and can usually be found laptop hard disk with a thickness of about 10-12 mm. This is very thin and light notebook and laptop models equivalent. … Now, how to measure the speed of the hard disk of the laptop? Well, in comparison to their desktop and enterprise counterparts, laptop hard drives tend to be slower. Usually stated that the portable hard drive 5400 rpm. …